Could I speak to is in charge of International Sales please?
A. who
B. what
C. whoever
D. Whatever
网友回答
A. who
B. what
(答案→)C. whoever
D. Whatever
解析：考查宾语从句。Whoever引导宾语从句whoever is in charge of International Sales .并在句中做主语。因为主语是人，所以排除BD。AC两项比较C项是最佳答案。